Edit: I think I was thinking of this thread that Jason started:
https://forum.inaturalist.org/t/does-your-nature-knowledge-spoil-fiction/ (100 replies)
The first reply in Jason’s thread (in 2020) was also about Finding Nemo:
Another relevant thread:
https://forum.inaturalist.org/t/trying-to-id-when-watching-shows/ (46 replies)